Socket problem - readline won't work properly

Question

I try to code a client and server connection using socket. The problem is my client can\'t read the response from the server (it hangs on the readline).

Here is some

Answer 1

out.write("My message");

That doesn't send a line terminator so it can never be read. Use println().

out.println(clientResponse+"\n");

That will send the clientResponse plus a newline plus a \n. The last part will probably be interpreted as a blank line. Not much point in that. Remove the \n.

do{
    response = in.readLine(); //This is where the code hang
}while (response.length()<= 0);

That's not the correct way to read lines. It will get an NPE at EOS; the response length can never be negative; and why would you send yourself blank lines? The correct way is this:

while ((response = in.readLine()) != null) {
    // if (response.length() == 0) continue; // if you must
    // process the line
}
// when you get here EOS has occurred.